Question 4 Page 149 - Chapter 11 Class 9 - Work and Energy

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Question 4 Page 149 A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field? Force exterted = F = 140 N Distance = s = 15 m Work done = Force × Distance = 140 × 15 = 2100 J Work done is 2100 J

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo